666734672734 has 16 divisors (see below), whose sum is σ = 1077072993360. Its totient is φ = 307712249280.

The previous prime is 666734672731. The next prime is 666734672743. The reversal of 666734672734 is 437276437666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666734672731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256849 + ... + 1182979.

It is an arithmetic number, because the mean of its divisors is an integer number (67317062085).

Almost surely, 2^666734672734 is an apocalyptic number.

666734672734 is a deficient number, since it is larger than the sum of its proper divisors (410338320626).

666734672734 is a wasteful number, since it uses less digits than its factorization.

666734672734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953835.

The product of its digits is 128024064, while the sum is 61.

The spelling of 666734672734 in words is "six hundred sixty-six billion, seven hundred thirty-four million, six hundred seventy-two thousand, seven hundred thirty-four".